So I put the orb together and the blue light is streaking towards the bridge, I waited several minutes but every time I tried to walk the bridge with the purple lightining I was shocked and injured. I know this is almost the very end of what until now was an awesome game, please tell me I have missed something.

There's still power going to the "lightning chamber" place. You need to look around for something that is powering it and shut it off. Perhaps an area that was blocked off before you got captured but is now open?